Adlink cPCI-9116 Bedienungsanleitung PDF herunterladen (Seite 54)

44 • Operation Theory

(M_Counter=M=2, DIV_Counter=4, SC_Counter=N=2)

A

cquisition_in_progress

Scan_start

A

D_conversion

Scan_in_progress

(SSH_OUT)(pin47)

A

c

q

uired data

A

cquired & stored data

(M+N scans)

Trigger occurs when a scan is in progress

O

p

eration start

ExtTrg(pin46)

M scans before

trigger

N scans

after trigger

Figure 15: Middle trigger (trigger with scan is in progress)

Post-Trigger Acquisition

Use post-trigger acquisition in applications where you want to collect data after

an external trigger event. The number of scans after the trigger is specified in

SC_counter, as illustrated in fig 16. The total acquired data length =

DIV_counter *SC_counter.

(DIV_Counter=4, SC_Counter=3)

A

cquisition_in_progress

Scan_start

A

D_conversion

Scan_in_progress

(SSH_OUT)

A

cquired & stored data

(3 scans)

O

p

eration start

ExtTrg

Figure 16: Post trigger

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